Yamaha FZ1-N Service Manual page 31

Limit
Valve guide inside diameter (intake)
Limit
Valve guide inside diameter (exhaust)
Limit
Valve-stem-to-valve-guide clearance (intake)
Limit
Valve-stem-to-valve-guide clearance (exhaust)
Limit
Valve stem runout
Cylinder head valve seat width (intake)
Cylinder head valve seat width (exhaust)
Valve spring
Inner spring
Free length (intake)
Free length (exhaust)
Installed length (intake)
Installed length (exhaust)
Spring rate K1 (intake)
Spring rate K2 (intake)
Spring rate K1 (exhaust)
Spring rate K2 (exhaust)
Installed compression spring force (intake)
Installed compression spring force (exhaust)
Spring tilt (intake)*
Spring tilt (exhaust)*
Winding direction (intake)
Winding direction (exhaust)
Cylinder
Bore
Taper limit
Out of round limit
Piston
Piston-to-cylinder clearance
Limit
Diameter D
Height H
ENGINE SPECIFICATIONS
4.425 mm (0.1742 in)
4.000–4.012 mm (0.1575–0.1580 in)
4.050 mm (0.1594 in)
4.500–4.512 mm (0.1772–0.1776 in)
4.550 mm (0.1791 in)
0.010–0.037 mm (0.0004–0.0015 in)
0.080 mm (0.0032 in)
0.025–0.052 mm (0.0010–0.0020 in)
0.100 mm (0.0039 in)
0.010 mm (0.0004 in)
0.90–1.10 mm (0.0354–0.0433 in)
0.90–1.10 mm (0.0354–0.0433 in)
40.47 mm (1.59 in)
40.53 mm (1.60 in)
32.66 mm (1.29 in)
33.88 mm (1.33 in)
17.53 N/mm (100.10 lb/in) (1.79 kgf/mm)
22.86 N/mm (130.53 lb/in) (2.33 kgf/mm)
21.52 N/mm (122.88 lb/in) (2.19 kgf/mm)
27.99 N/mm (159.82 lb/in) (2.85 kgf/mm)
127.40–144.60 N (28.64–32.51 lb) (12.99–
14.74 kgf)
133.00–153.00 N (29.90–34.39 lb) (13.56–
15.60 kgf)
2.5 °/1.8 mm
2.5 °/1.8 mm
Clockwise
Clockwise
77.000–77.010 mm (3.0315–3.0319 in)
0.050 mm (0.0020 in)
0.050 mm (0.0020 in)
0.010–0.035 mm (0.0004–0.0014 in)
0.12 mm (0.0047 in)
76.975–76.990 mm (3.0305–3.0311 in)
5.0 mm (0.20 in)
2-4